Basic blue 3 appearance is bronze powder (or liquid), solubility is less affected by temperature, aqueous solution is green blue. Dark red in concentrated sulfuric acid, reddish blue after dilution. Add sodium hydroxide to blue solution Black precipitated. Acrylic fiber is bright green light blue, greener under tungsten light. Dyeing at 120°C, the color is greener. When dyeing, the copper ion color is noticeably green, and the iron ion color is dim. The blocking group of blue SD-GB and cationic turquoise blue-GB-GB is 1-naphthalenesulfonic acid group.
TRADE NAME:Cationic blue 3,Disperse cationic turquoise blue SD-GB
K value | f value | Solubility(g/L) | Other fiber stain(grade) | Dyeing pH value | Application classification | ||||||
98℃ | 40℃ | 20℃ | cotton | viscose | nylon | polyester | wool | ||||
3.5 | 0.31 | 40 | 40 | 40 | 4 | 5 | 5 | 5 | 4 | 2.5~8 | Disperse |
Basic blue 3 contains toxic aromatic amines, which are banned dyes for acute toxicity.
Recommended dosage varies by shade depth and substrate. Start with a small trial: for light shades try 0.05–0.2% owf (on-weight-of-fiber) and for medium to deep shades 0.2–1.0% owf. For printing, prepare concentrated paste trials and adjust rheology and auxiliaries for good transfer and levelness.
Basic Blue 3 typically exhibits moderate to limited washfastness and lightfastness. Improve durability with after-treatments such as fixation agents, appropriate leveling/resin finishes for prints, or protective topcoats. For outdoor applications choose pigments or more lightfast dye systems instead.
Yes — it mixes well with other basic dyes to form blue-green or purple blends, and can be used in multicomponent recipes. Compatibility with non-basic dye classes (reactive, vat) depends on application method; co-application often requires auxiliaries or sequential processes to avoid migration or leveling issues.
Handle Basic Blue 3 with PPE to avoid skin staining and inhalation. Waste streams containing basic dyes should be treated per local regulations—common treatments include flocculation/filtration or advanced oxidation to reduce color load before discharge.
Store in a cool, dry area away from strong oxidizers and direct sunlight. Keep containers tightly closed. Under recommended storage conditions many basic dyes remain stable for 1–3 years; run a small compatibility check if stock has been stored long term.
